GNC SuperFoods Spirulina Go to amazon.com Related posts Check expert advices for spirulina capsules gnc? FeatureWith PhytonutrientsSpirulina Is A Blue-Green Microalgae That Is A Natural Source Of Essential Phytonutrients, Protein And Amino Acids. DescriptionWith Phytonutrients Spirulina Is A Blue-Green Microalgae That Is A Natural Source Of Essential Phytonutrients, Protein And Amino Acids.